Question: What position did Frederick Douglass hold in 1881?
Paraphrase: Which was the position that Frederick Douglass held in 1881?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q215562 p:P39 ?s . ?s ps:P39 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'1881')) }